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Share Repurchase Program (Tables) | 6 Months Ended
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Jun. 30, 2020
Share Repurchase Program |
Schedule of shares repurchased | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended | ​ | For the Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019
Shares repurchased |  | ​ | 185 |  | ​ | 1,633 |  | ​ | 1,669 |  | ​ | 2,560
Average price per share | ​ | $ | 417.79 | ​ | $ | 366.76 | ​ | $ | 390.14 | ​ | $ | 359.63
Total investment | ​ | $ | 76,974 | ​ | $ | 598,846 | ​ | $ | 651,011 | ​ | $ | 920,692

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